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Mar 15 VH

dailysudoku.com Forum Index -> Daily Sudoku puzzles

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ZeroAssoluto

Joined: 05 Feb 2017
Posts: 936
Location: Rimini, Italy

Posted: Fri Mar 15, 2024 10:06 am Post subject: Mar 15 VH

Hi everyone,

Code:

+--------+-----------+-----------+
| 3 8 6 | 2 19 4 | 5 179 179 |
| 2 15 7 | 89 6 58 | 3 4 19 |
| 4 15 9 | 37 17 35 | 8 2 6 |
+--------+-----------+-----------+
| 6 7 5 | 1 3 9 | 2 8 4 |
| 1 3 8 | 6 4 2 | 9 57 57 |
| 9 4 2 | 5 8 7 | 1 6 3 |
+--------+-----------+-----------+
| 5 9 4 | 378 27 38 | 6 13 12 |
| 7 2 1 | 39 5 6 | 4 39 8 |
| 8 6 3 | 4 29 1 | 7 59 259 |
+--------+-----------+-----------+

Play this puzzle online at the Daily Sudoku site

Quote:

XY-Wing 3,8,9 in r28c4,r7c6 and -8 in r2c6,r7c4
or
XYZ-Wing 3,7,8 in r37c4,r7c6 and -3 in r8c4
.

Ciao Gianni

TomC

Joined: 30 Oct 2020
Posts: 358
Location: Wales

Posted: Fri Mar 15, 2024 1:23 pm Post subject:

I thought I saw a <129> XY wing in abc, not so, but still helped me remove <2> from r7c5 or r9c9 to solve

Code:

+--------+------------+------------+
| 3 8 6 | 2 19 4 | 5 179 179 |
| 2 15 7 | 89 6 58 | 3 4 c19 |
| 4 15 9 | 37 17 35 | 8 2 6 |
+--------+------------+------------+
| 6 7 5 | 1 3 9 | 2 8 4 |
| 1 3 8 | 6 4 2 | 9 57 57 |
| 9 4 2 | 5 8 7 | 1 6 3 |
+--------+------------+------------+
| 5 9 4 | 378 x27 38 | 6 13 b12 |
| 7 2 1 | 39 5 6 | 4 39 8 |
| 8 6 3 | 4 a29 1 | 7 59 x259 |
+--------+------------+------------+

Quote:

If x=2, a=9
If x=2, b=1, c=9
Leads to no <9>'s in row 1

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